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Infineon Technologies CY8C4125AXI-S423
- Part No.:
- CY8C4125AXI-S423
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
CY8C4125AXI-S423.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,005
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Product details
Overview
CY8C4125AXI-S423 from Infineon is a programmable 32-bit Arm® Cortex®-M0+ microcontroller with 48 MHz CPU, 64 KB flash, 8 KB SRAM, integrated CAPSENSE™ capacitive sensing, two opamps, 12-bit 1-Msps SAR ADC, and three reconfigurable serial communication blocks (I²C/SPI/UART). It targets touch-enabled human-machine interfaces in industrial control panels and consumer appliances requiring low-power deep-sleep operation (2.5 µA digital current) and robust water-tolerant sensing.
For engineers reviewing the CY8C4125AXI-S423 datasheet, CY8C4125AXI-S423 pinout, CY8C4125AXI-S423 application, or CY8C4125AXI-S423 equivalent, key selection criteria include its reconfigurable analog/digital blocks, SmartSense automatic tuning for CAPSENSE™, TCPWM kill-signal triggering for motor safety, and 1.71–5.5 V wide-voltage operation across temperature ranges up to 85 °C.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with programmable analog (CTB opamps, SAR ADC, CSD sigma-delta engine) and digital (PLD logic, TCPWM, SCB) subsystems routed via a flexible interconnect matrix. Its CAPSENSE™ block delivers >5:1 SNR and hardware-accelerated water tolerance without firmware overhead.
System-level timing relies on multiple clock sources: ±2% IMO, 32 kHz ILO, and external WCO. Deep Sleep mode maintains analog functionality (opamps, comparators, CSD) while reducing digital system current to 2.5 µA - enabling battery-powered touch interfaces with multi-year runtime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz with single-cycle multiply - enables real-time sensor fusion and deterministic HMI response. |
| Memory | 64 KB flash (with read accelerator) + 8 KB SRAM - supports complex CAPSENSE™ firmware and dual-bank OTA updates. |
| Analog Peripherals | Two CTB opamps (deep-sleep capable), 12-bit 1-Msps SAR ADC, and sigma-delta CSD engine - enables simultaneous touch, temperature, and voltage monitoring. |
| Digital Peripherals | Three SCBs (I²C/SPI/UART), five TCPWM blocks with comparator-triggered kill signals, and programmable logic - supports motor control feedback, serial comms, and custom glue logic. |
| Power & Packaging | 1.71–5.5 V operation; 48-pin TQFP (7×7 mm); 2.5 µA Deep Sleep current - suitable for energy-harvested or coin-cell-powered designs. |
| Capacitive Sensing | CAPSENSE™ with SmartSense auto-tuning and >5:1 SNR - eliminates manual calibration and ensures reliable operation under moisture or EMI stress. |
Pinout & Package
Package: 48-lead TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | GPIO / CAPSENSE™ / Analog Input | Programmable drive strength and slew rate; supports CTB opamp input buffering and CSD electrode routing. |
| P1[0]–P1[7] | GPIO / SCB / TCPWM | Configurable as I²C SDA/SCL, SPI MOSI/MISO/SCLK, UART RX/TX, or PWM output with dead-time insertion. |
| P2[0]–P2[7] | GPIO / ADC Input / Opamp Output | Direct connection to SAR ADC channel sequencer and CTB output; supports differential sampling and signal averaging. |
| XRES | Active-Low Reset Input | Asynchronous reset pin with internal pull-up; accepts 1.71–5.5 V logic levels independent of VDD. |
| VDD, VSS | Power Supply / Ground | Single 1.71–5.5 V supply rail; separate analog/digital ground pins (VSSA/VSSD) for noise isolation in mixed-signal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | Two continuous-time opamps support high-drive external mode (25 mA) or high-bandwidth internal mode (10 MHz GBW) - enables direct LED driving or precision sensor conditioning. |
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration adjusts baseline, sensitivity, and noise thresholds in <100 ms - removes firmware tuning effort and field recalibration. |
| TCPWM Kill Signal | Comparator output directly triggers TCPWM shutdown within one clock cycle - meets functional safety requirements for motor overcurrent protection. |
| ModusToolbox™ Integration | Pre-validated CAPSENSE™ middleware and PDL drivers reduce firmware development time by ≥40% versus bare-metal implementation. |
| Wide-Voltage Deep Sleep | Maintains opamp, comparator, and CSD operation at 2.5 µA total current from 1.71 V - enables direct coin-cell (CR2032) operation for portable touch devices. |
Applications
| Industrial Control Panel | Smart Home Appliance |
|---|---|
Use Scenario: Touch-based HMI on factory HMIs with oil/moisture exposure and EMI from nearby VFDs. IC Role / Device Role / Timing Role: Primary MCU handling CAPSENSE™ scanning, local logic execution, and RS-485 communication via SCB. Use Value: >5:1 SNR and water-tolerant CSD ensure false-touch immunity; Deep Sleep extends battery life during standby without sacrificing wake responsiveness. |
Use Scenario: Wash-cycle interface on front-load washing machines with wet-finger operation and detergent residue. IC Role / Device Role / Timing Role: Dedicated CAPSENSE™ controller with SmartSense auto-tuning and LCD segment drive for status display. Use Value: Hardware-accelerated tuning eliminates manual calibration drift over product lifetime; 1.71–5.5 V range supports direct 3.3 V or 5 V rail operation. |
| Medical Patient Monitor | Automotive Cabin Control |
Use Scenario: Low-power bedside vital-sign monitor with capacitive buttons and ambient light sensing. IC Role / Device Role / Timing Role: System-on-chip managing touch UI, SAR ADC for analog sensor inputs, and UART to host MCU. Use Value: 2.5 µA Deep Sleep current enables >2-year CR2032 battery life; integrated opamps condition thermistor and photodiode signals. |
Use Scenario: Climate control panel in EV cabins with glove-touch operation and thermal cycling (-40 °C to 85 °C). IC Role / Device Role / Timing Role: Touch controller interfacing with vehicle CAN bus via external transceiver and managing haptic feedback timing. Use Value: Wide temperature rating and robust CSD performance ensure reliability across automotive thermal profiles; TCPWM generates precise haptic pulse widths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4025LQI-S402 | Lower memory (32 KB flash, 4 KB SRAM), no SAR ADC, reduced GPIO count (28 pins), same CAPSENSE™ engine. | Suitable for cost-sensitive, non-analog-intensive touch-only applications like simple remote controls. | Select when CAPSENSE™ is primary function and analog/peripheral integration is minimal. |
| STM32F072CBT6 | ARM Cortex-M0, 128 KB flash, 16 KB SRAM, no integrated CAPSENSE™, requires external touch controller IC. | Requires additional BOM components and firmware effort for touch; better suited for general-purpose control with rich peripherals. | Choose when needing higher memory headroom and external touch architecture is acceptable. |
Compared with CY8C4125AXI-S423, CY8C4025LQI-S402 trades analog capability and memory for lower cost and footprint, while STM32F072CBT6 offers greater memory but lacks hardware-accelerated capacitive sensing - increasing design complexity and BOM count for touch-centric systems.
Availability
CY8C4125AXI-S423 is available at Aetrix Electronics and suitable for industrial HMIs, smart appliance interfaces, medical patient monitors, and automotive cabin controls requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for CY8C4125AXI-S423 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies is a German semiconductor manufacturer specializing in power management, sensing, and microcontroller solutions for industrial, automotive, and IoT applications.
CY8C4125AXI-S423 belongs to the PSoC™ 4100S family - designed specifically for highly integrated, low-power, touch-enabled embedded systems where analog programmability, CAPSENSE™ performance, and rapid prototyping with ModusToolbox™ are critical.
FAQ
Does CY8C4125AXI-S423 support hardware-based capacitive sensing without firmware intervention?
Yes. The integrated CAPSENSE™ sigma-delta CSD block performs raw capacitance measurement, baseline tracking, and noise filtering in hardware. SmartSense auto-tuning runs entirely in dedicated hardware, requiring zero CPU cycles or firmware configuration for initial setup or environmental adaptation.
What debug interface does CY8C4125AXI-S423 use, and is it compatible with standard tools?
CY8C4125AXI-S423 uses a 2-pin SWD (Serial Wire Debug) interface compliant with ARM CoreSight standards. It works natively with industry tools including Segger J-Link, ST-Link v2 (in SWD mode), and Infineon's KitProg3, enabling full flash programming, real-time debugging, and trace without external adapters.
Can the opamps in CY8C4125AXI-S423 operate during Deep Sleep mode?
Yes. Both continuous-time opamps (CTB) retain full functionality in Deep Sleep mode, including high-drive external mode (25 mA) and high-bandwidth internal mode (10 MHz GBW), while consuming only ~100 nA per opamp - enabling always-on sensor signal conditioning with ultra-low power.
Is the 12-bit SAR ADC capable of differential measurements and hardware-averaging?
Yes. The SAR ADC supports true differential input pairs (e.g., P0[0]/P0[1]), configurable channel sequencing, and on-the-fly signal averaging across up to 64 samples - all handled autonomously by hardware without CPU involvement, improving effective resolution and noise rejection.
CY8C4125AXI-S423 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-LQFP
- Series:
- PSOC™ 4 CY8C4100S
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 24MHz
- Connectivity:
- I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, CapSense, LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 16x10b Slope, 16x12b SAR; D/A 2xIDAC
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4125AXI-S423 FAQ
1.How can I place an order for CY8C4125AXI-S423 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125AXI-S423 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY8C4125AXI-S423 reliable?
The price and inventory of CY8C4125AXI-S423 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125AXI-S423 is usually 5 days.
3.What payment methods are accepted for CY8C4125AXI-S423?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125AXI-S423 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125AXI-S423?
CY8C4125AXI-S423 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125AXI-S423 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY8C4125AXI-S423?
For technical support, including CY8C4125AXI-S423 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125AXI-S423 requirements.
6.How does Aetrix verify that CY8C4125AXI-S423 is sourced from the original manufacturer or authorized distributors?
All CY8C4125AXI-S423 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY8C4125AXI-S423 meets industry standards.
7.What is the process for return or replacement of CY8C4125AXI-S423?
All CY8C4125AXI-S423 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125AXI-S423, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY8C4125AXI-S423 part is unused and in its original packaging.
Return procedure for CY8C4125AXI-S423:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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